GMFK25S – Front Axle SES Suspension Upgrade

GMFK25S - Front Axle SES Suspension Upgrade

This SES Suspension Upgrade fits the front suspension of a Chevrolet Silverado 1500/2500/3500 & GMC Sierra 1500/2500/3500 truck (see below for full list of applications). Each laser-cut piece of steel is powder-coated to ensure a quality fit. We’ve engineered our hollow rubber springs to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs (weight from a snowplow or heavy aftermarket accessories – such as a steel bumper) the harder they work to prevent front-end sag.

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Product Features

  • Eliminate Vehicle Squatting & Sagging
  • Cushion Road Shocks
  • Improve Handling
  • Satisfaction Guarantee
  • Lifetime Warranty

Customer Reviews


"The Timbren system is the answer for rear end sag and soft handling! My 35ft 5th wheel handles much better, and I recommend Timbren without reservation."

- Larry V. - SD

“Timbren's work amazing! Absolutely as good or even better than air bags! Did it myself and only had time to drink 2 beer doing it! Easy install. Thanks for the advice. Simple yet very effective.”

Jonny K - NB

Fitment Checklist


Cadillac Escalade
2002-2006
4WD Only With Rear Coil Spring Suspension
Chevrolet Avalanche 2500
2002-2006
2/4WD
Chevrolet K2500 Pickup
1996-2000
4WD Only With Front Cast Lower Control Arm
Chevrolet K3500 Pickup/Cab Chassis
1996-2000
4WD Only With Front Cast Lower Control Arm
Chevrolet Silverado 1500
1999-2006
2WD Only
Chevrolet Silverado 1500 HD
2001-2007
2/4WD
Chevrolet Silverado 2500
1999-2004
2/4WD
Chevrolet Silverado 2500 HD
2001-2010
2/4WD
Chevrolet Silverado 3500
2001-2010
2/4WD
Chevrolet Suburban 1500
2000-2006
2WD Only
Chevrolet Suburban 2500
2000-2013
2/4WD
GMC C3500HD Pickup/Cab Chassis
1996-2000
4WD Only With Front Cast Lower Control Arm
GMC K2500 Pickup
1996-2000
4WD Only With Front Cast Lower Control Arm
GMC K3500 Pickup/Cab Chassis
1996-2000
4WD Only With Front Cast Lower Control Arm
GMC Sierra 1500
1999-2006
2WD Only
GMC Sierra 1500 HD
2001-2007
2/4WD
GMC Sierra 2500
1999-2004
2/4WD
GMC Sierra 2500 HD
2001-2010
2/4WD
GMC Sierra 3500 Pickup/Cab Chassis
2001-2010
2/4WD
GMC Yukon XL 1500
2000-2006
2WD Only
GMC Yukon XL 2500
2000-2015
2/4WD
Hummer H2
2003-2010
4WD Only
Mitsubishi Montero
2001-2006
4WD Only. Used On The Rear Suspension

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